Water-base ink and process for production of dyes

Aqueous ink for ink-jet recording contains >=1 naphthol sulfonate disazo dye or its salts as colorant and an aqueous solvent as main components. The dye is of formula (I): [Image] R1 and R3H, OH, or halogen; R2 and R4H, optionally substituted alkyl, optionally substituted aryl or optionally subst...

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Bibliographische Detailangaben
Hauptverfasser:	KOHGO OSAMU, MATSUZAKI YORIAKI, FUJII KENICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS CORRECTION OF TYPOGRAPHICAL ERRORS DYES FILLING PASTES i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INKS LAKES LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	Aqueous ink for ink-jet recording contains >=1 naphthol sulfonate disazo dye or its salts as colorant and an aqueous solvent as main components. The dye is of formula (I): [Image] R1 and R3H, OH, or halogen; R2 and R4H, optionally substituted alkyl, optionally substituted aryl or optionally substituted aralkyl; A : phenyl or naphthyl optionally substituted by halogen, OH, amino, optionally substituted alkyl, alkoxy, carboxyl, carboxylate, sulfonamide, sulfonic acid and/or carboxylic acid amide groups; X : alkylene, phenylene, xylylene, naphthylene, biphenylene or a group (II), optionally substituted by halogen, alkyl, alkoxy, OH, amino, carboxyl or sulfonic acid group; Z : -CO-, -NHCONH-, -NHCSNH- or a group (III); m and n : 1-4. An independent claim is also included for the manufacture of the dye by dissolving a dye (I) or its salt in water and removing impurities by adjusting pH to >=9. [Image].